Pub Date : 2023-05-09DOI: 10.1080/17597269.2023.2206695
Priyadharsini P, Dawn Ss, A. J, Alok Ranjan, J. J.
Abstract To address expanding issues related to global climate change and rising conventional fuel prices, bioethanol stands to be a viable green resource as an eco-fuel to fulfil power requirements for transport. The search for third-generation bioethanol feedstock made from marine algae, which is sustainable as a feedstock for bioethanol and has positive effects on both the environment and food security. The current review presents a critical analysis and gives a full description of the sequential method for producing bioethanol from macroalgae and derived rejects, and recent advances in the production of biofuels using genetic engineering. The economic viability of algae-derived biofuel is dependent on production costs, which might be reduced by creating valuable secondary by-products, which is the goal of current algal biofuel research. Clean energy is the primary amenity and making it affordable is one of the goals of sustainable development. Achieving this with local populations through skill development and training to contribute towards Sustainable Development Goals 1 and 7 has been explained. Future technologies will harness the cost-effectiveness of sustainable bioethanol by having the capability for maximal extraction capacity and minimal downstream processing utilizing low-cost feedstock.
{"title":"Recent advances in conventional and genetically modified macroalgal biomass as substrates in bioethanol production: a review","authors":"Priyadharsini P, Dawn Ss, A. J, Alok Ranjan, J. J.","doi":"10.1080/17597269.2023.2206695","DOIUrl":"https://doi.org/10.1080/17597269.2023.2206695","url":null,"abstract":"Abstract To address expanding issues related to global climate change and rising conventional fuel prices, bioethanol stands to be a viable green resource as an eco-fuel to fulfil power requirements for transport. The search for third-generation bioethanol feedstock made from marine algae, which is sustainable as a feedstock for bioethanol and has positive effects on both the environment and food security. The current review presents a critical analysis and gives a full description of the sequential method for producing bioethanol from macroalgae and derived rejects, and recent advances in the production of biofuels using genetic engineering. The economic viability of algae-derived biofuel is dependent on production costs, which might be reduced by creating valuable secondary by-products, which is the goal of current algal biofuel research. Clean energy is the primary amenity and making it affordable is one of the goals of sustainable development. Achieving this with local populations through skill development and training to contribute towards Sustainable Development Goals 1 and 7 has been explained. Future technologies will harness the cost-effectiveness of sustainable bioethanol by having the capability for maximal extraction capacity and minimal downstream processing utilizing low-cost feedstock.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48354456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-09DOI: 10.1080/17597269.2023.2206696
Srinivasa Reddy Pala, Varaha Siva Prasad Vanthala, J. Sagari
Abstract The present study addresses the effect of graphene oxide (GO) nanoparticles dispersed in a mahua biodiesel blend (B20) on diesel engine performance, combustion, and emissions. GO nanoparticles were considered at a level of 75 mg/L. Also, the surfactant CTAB and dispersant Tween 80 were added in a 1:1 ratio. Stability analysis was performed using a photospectrometer. The injection pressure was varied from 200 to 250 bar. The performance parameters such as brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were improved by dispersing nanoparticles in B20. Combustion characteristics such as cylinder pressure (CP) and net heat release rate (NHRR) were also greatly improved by nanoparticle dispersion. Finally, emissions of carbon monoxide (CO), unburned hydrocarbon (UHC), smoke, and nitrogen oxides (NOx) were greatly reduced. The dispersant-added GO nanoparticles showed exceptional results. At 250 bar, the B20 + GO 75 mg/L + Tween 75 mg/L showed a 5.067% improvement in BTE and a 6.293% reduction in BSFC. In addition, CP and NHRR were improved by 3.13% and 43.85%, respectively. Finally, reductions in CO, UHC, NOx, and smoke opacity were found to be approximately 27.77%, 37.63%, 11.07%, and 38.55%, respectively.
{"title":"Influence of graphene oxide nanoparticles dispersed mahua oil biodiesel on diesel engine: performance, combustion, and emission study","authors":"Srinivasa Reddy Pala, Varaha Siva Prasad Vanthala, J. Sagari","doi":"10.1080/17597269.2023.2206696","DOIUrl":"https://doi.org/10.1080/17597269.2023.2206696","url":null,"abstract":"Abstract The present study addresses the effect of graphene oxide (GO) nanoparticles dispersed in a mahua biodiesel blend (B20) on diesel engine performance, combustion, and emissions. GO nanoparticles were considered at a level of 75 mg/L. Also, the surfactant CTAB and dispersant Tween 80 were added in a 1:1 ratio. Stability analysis was performed using a photospectrometer. The injection pressure was varied from 200 to 250 bar. The performance parameters such as brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were improved by dispersing nanoparticles in B20. Combustion characteristics such as cylinder pressure (CP) and net heat release rate (NHRR) were also greatly improved by nanoparticle dispersion. Finally, emissions of carbon monoxide (CO), unburned hydrocarbon (UHC), smoke, and nitrogen oxides (NOx) were greatly reduced. The dispersant-added GO nanoparticles showed exceptional results. At 250 bar, the B20 + GO 75 mg/L + Tween 75 mg/L showed a 5.067% improvement in BTE and a 6.293% reduction in BSFC. In addition, CP and NHRR were improved by 3.13% and 43.85%, respectively. Finally, reductions in CO, UHC, NOx, and smoke opacity were found to be approximately 27.77%, 37.63%, 11.07%, and 38.55%, respectively.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42388470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-03DOI: 10.1080/17597269.2023.2206698
M. Islam, M. Parveen, Md Sazan Rahman, J. Ferdous, M. A. Kader, K. Takai
Abstract The conversion of cedar wood which is abundantly found in the forests of Japan, into biofuels and chemicals by externally heated fixed-bed pyrolysis reactor has been taken into consideration in this study. The selected solid biomass in particle form were fed into the reactor by gravity feed type reactor feeder. The output products were liquid (oil), solid char, and gas. The liquid and char products were collected separately while the gas was flared into the atmosphere. The process conditions were found to influence the product yields significantly. The maximum liquid yields were 48 wt% of solid particles at reactor temperature 450 °C for N2 gas flow rate 6 L/min, feed particle size 1180–1700 µm, and running time 30 min. The liquid product obtained at this optimum condition was characterized by physical properties, chemical analysis, and gas chromatograph mass spectrometry techniques. The results show that it is possible to obtain liquid product from cedar wood that are comparable to petroleum fuels and other valuable chemicals.
{"title":"Thermo chemical conversion of cedar wood by pyrolysis technology for bio-oil","authors":"M. Islam, M. Parveen, Md Sazan Rahman, J. Ferdous, M. A. Kader, K. Takai","doi":"10.1080/17597269.2023.2206698","DOIUrl":"https://doi.org/10.1080/17597269.2023.2206698","url":null,"abstract":"Abstract The conversion of cedar wood which is abundantly found in the forests of Japan, into biofuels and chemicals by externally heated fixed-bed pyrolysis reactor has been taken into consideration in this study. The selected solid biomass in particle form were fed into the reactor by gravity feed type reactor feeder. The output products were liquid (oil), solid char, and gas. The liquid and char products were collected separately while the gas was flared into the atmosphere. The process conditions were found to influence the product yields significantly. The maximum liquid yields were 48 wt% of solid particles at reactor temperature 450 °C for N2 gas flow rate 6 L/min, feed particle size 1180–1700 µm, and running time 30 min. The liquid product obtained at this optimum condition was characterized by physical properties, chemical analysis, and gas chromatograph mass spectrometry techniques. The results show that it is possible to obtain liquid product from cedar wood that are comparable to petroleum fuels and other valuable chemicals.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47827314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-03DOI: 10.1080/17597269.2023.2207400
M. Nur, Chisya Ayu Puspitaweni, Maya Puspitasari, Faizah Hadi, S. Murni, Wibiana Wulan Nandari, T. M. Setyoningrum
Abstract Bioethanol is mainly produced from corn worldwide, but many countries face challenges in producing sufficient corn for this purpose. White sweet potato (Ipomoea batatas Linneaus) has a lower nutritional value and less carotene pigment compared to other sweet potatoes, which may make it less desirable as a food source in some regions. However, the affordability of white sweet potato could make it an attractive option for bioethanol production in areas where corn is not readily available. This study investigated the use of white sweet potatoes powder (40 mesh sieve) as a feedstock for ethanol production using Saccharomyces cerevisiae yeast. Optimization of the fermentation process was carried out using response surface methodology (RSM). Results showed that an ethanol yield of 18% could be achieved by applying pH at 4.5 and urea concentration of 60 mg/L. These findings suggest that the addition of urea during hydrolysis of white sweet potato is a promising alternative method for bioethanol production which contained higher etnaol yield compated to the previous finding that utilized amyloglucosidase enzyme during hydrolysis.
{"title":"Urea addition during hydrolysis for increased ethanol yield from white sweet potato: a promising strategy","authors":"M. Nur, Chisya Ayu Puspitaweni, Maya Puspitasari, Faizah Hadi, S. Murni, Wibiana Wulan Nandari, T. M. Setyoningrum","doi":"10.1080/17597269.2023.2207400","DOIUrl":"https://doi.org/10.1080/17597269.2023.2207400","url":null,"abstract":"Abstract Bioethanol is mainly produced from corn worldwide, but many countries face challenges in producing sufficient corn for this purpose. White sweet potato (Ipomoea batatas Linneaus) has a lower nutritional value and less carotene pigment compared to other sweet potatoes, which may make it less desirable as a food source in some regions. However, the affordability of white sweet potato could make it an attractive option for bioethanol production in areas where corn is not readily available. This study investigated the use of white sweet potatoes powder (40 mesh sieve) as a feedstock for ethanol production using Saccharomyces cerevisiae yeast. Optimization of the fermentation process was carried out using response surface methodology (RSM). Results showed that an ethanol yield of 18% could be achieved by applying pH at 4.5 and urea concentration of 60 mg/L. These findings suggest that the addition of urea during hydrolysis of white sweet potato is a promising alternative method for bioethanol production which contained higher etnaol yield compated to the previous finding that utilized amyloglucosidase enzyme during hydrolysis.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43072314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-02DOI: 10.1080/17597269.2023.2197730
Syafiqah Md Nadzir, N. Yusof, Norazela Nordin, A. Kamari, Mohd Nur Ashraf Mohd Yusoff
Abstract Microalgal biomass has received much attention as a renewable energy source and a possible replacement for petroleum-based fuels. Currently, mechanical, thermal, and chemical cell disruption methods are limited in terms of economics, sustainability, and environmental friendliness. Because of this, biological methods are preferred. The structure and composition of cell walls in commonly used commercial microalgae, as well as the production of lipid and carbohydrate biomolecules for microalgal biofuel, are discussed in this paper. Furthermore, the advantages and disadvantages of various mechanical and non-mechanical cell disruption methods for recovering biomolecules from microalgae are compared. The current biological methods of cell disruption are investigated, such as gene manipulation and autolysis. The relationship between autolysis and programmed cell death and factors influencing the process are also discussed. This review will help researchers select the proper method for recovering biomolecules from microalgae. The findings should expand the use of autolytic biological approaches for economic cell disruption in biofuel commercialisation.
{"title":"A review of microalgal cell wall composition and degradation to enhance the recovery of biomolecules for biofuel production","authors":"Syafiqah Md Nadzir, N. Yusof, Norazela Nordin, A. Kamari, Mohd Nur Ashraf Mohd Yusoff","doi":"10.1080/17597269.2023.2197730","DOIUrl":"https://doi.org/10.1080/17597269.2023.2197730","url":null,"abstract":"Abstract Microalgal biomass has received much attention as a renewable energy source and a possible replacement for petroleum-based fuels. Currently, mechanical, thermal, and chemical cell disruption methods are limited in terms of economics, sustainability, and environmental friendliness. Because of this, biological methods are preferred. The structure and composition of cell walls in commonly used commercial microalgae, as well as the production of lipid and carbohydrate biomolecules for microalgal biofuel, are discussed in this paper. Furthermore, the advantages and disadvantages of various mechanical and non-mechanical cell disruption methods for recovering biomolecules from microalgae are compared. The current biological methods of cell disruption are investigated, such as gene manipulation and autolysis. The relationship between autolysis and programmed cell death and factors influencing the process are also discussed. This review will help researchers select the proper method for recovering biomolecules from microalgae. The findings should expand the use of autolytic biological approaches for economic cell disruption in biofuel commercialisation.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45165025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-01DOI: 10.1080/17597269.2023.2203433
Akossi Moya Joëlle Carole, Kouassi Konan Edmond, Abollé Abollé, Kouassi Esaie Kouadio Appiah, Yao Kouassi Benjamin
Abstract The goal of biodiesel production is to obtain a clean, biodegradable, and renewable fuel. Industrial-scale processes use homogeneous and heterogeneous chemical catalysts. These are efficient but require the use of very pure reagents and complex product purification steps or processing conditions under high temperature and pressure. Enzymatic catalysis, in contrast, using lipases as biocatalysts, is an alternative that produces a better-quality product under less extreme conditions. Since free lipases are not reusable, it is necessary to immobilize them to stabilize them and allow their reuse over several reaction cycles. This informative review presents various methods of lipase immobilization (physical adsorption, ionic bonding, covalent bonding, entrapment, encapsulation, and cross-linking) as well as their advantages and disadvantages, followed by a comparative study. Articles from 2010 to 2022 were used for bibliometry to show that the topic is still relevant. The immobilization methods are classified into two main groups, physical and chemical, according to the enzyme-support interaction. Among these methods, ionic bonding is recommended, because in addition to this process being easily achievable, lipases immobilized this way are more stable and reusable. In summary, the production of biodiesel from immobilized lipases is in line with sustainable development and respect for the environment.
{"title":"Transesterification of vegetable oils into biodiesel by an immobilized lipase: a review","authors":"Akossi Moya Joëlle Carole, Kouassi Konan Edmond, Abollé Abollé, Kouassi Esaie Kouadio Appiah, Yao Kouassi Benjamin","doi":"10.1080/17597269.2023.2203433","DOIUrl":"https://doi.org/10.1080/17597269.2023.2203433","url":null,"abstract":"Abstract The goal of biodiesel production is to obtain a clean, biodegradable, and renewable fuel. Industrial-scale processes use homogeneous and heterogeneous chemical catalysts. These are efficient but require the use of very pure reagents and complex product purification steps or processing conditions under high temperature and pressure. Enzymatic catalysis, in contrast, using lipases as biocatalysts, is an alternative that produces a better-quality product under less extreme conditions. Since free lipases are not reusable, it is necessary to immobilize them to stabilize them and allow their reuse over several reaction cycles. This informative review presents various methods of lipase immobilization (physical adsorption, ionic bonding, covalent bonding, entrapment, encapsulation, and cross-linking) as well as their advantages and disadvantages, followed by a comparative study. Articles from 2010 to 2022 were used for bibliometry to show that the topic is still relevant. The immobilization methods are classified into two main groups, physical and chemical, according to the enzyme-support interaction. Among these methods, ionic bonding is recommended, because in addition to this process being easily achievable, lipases immobilized this way are more stable and reusable. In summary, the production of biodiesel from immobilized lipases is in line with sustainable development and respect for the environment.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47014436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-21DOI: 10.1080/17597269.2023.2201729
L. Rocha‐Meneses, M. L. Risco, T. Bergamo
Abstract Although Colombia has a great potential for bioenergy production, the national energy matrix still has gaps and challenges when it refers to the promotion, adoption, and implementation of renewable sources of energy. In this study, we investigated the preferences of the local farmers and their willingness to adopt biogas technologies. Based on the results obtained, a protocol for the adoption of biodigesters by small farmers was proposed. The results obtained in this study show that the majority of the respondents of this study are the owners of their land, and use it mainly for agricultural purposes. Although about 56% of the inquiries do not have enough knowledge on how to obtain biogas from agricultural or livestock waste, about 93% are willing to use gas/biogas technologies instead of using firewood and other dry organic waste. Based on the results obtained in this study a protocol to support the development and implementation of biogas technologies in the rural areas of Colombia was proposed, taking into account the bioenergy potential available and the profile of the farmers.
{"title":"Farmers’ preferences and willingness to adopt anaerobic digestion technologies: a case study in rural areas in Colombia","authors":"L. Rocha‐Meneses, M. L. Risco, T. Bergamo","doi":"10.1080/17597269.2023.2201729","DOIUrl":"https://doi.org/10.1080/17597269.2023.2201729","url":null,"abstract":"Abstract Although Colombia has a great potential for bioenergy production, the national energy matrix still has gaps and challenges when it refers to the promotion, adoption, and implementation of renewable sources of energy. In this study, we investigated the preferences of the local farmers and their willingness to adopt biogas technologies. Based on the results obtained, a protocol for the adoption of biodigesters by small farmers was proposed. The results obtained in this study show that the majority of the respondents of this study are the owners of their land, and use it mainly for agricultural purposes. Although about 56% of the inquiries do not have enough knowledge on how to obtain biogas from agricultural or livestock waste, about 93% are willing to use gas/biogas technologies instead of using firewood and other dry organic waste. Based on the results obtained in this study a protocol to support the development and implementation of biogas technologies in the rural areas of Colombia was proposed, taking into account the bioenergy potential available and the profile of the farmers.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49072293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-21DOI: 10.1080/17597269.2023.2201732
I. Bakhattar, M. Asbik, A. Koukouch, I. Aadnan, O. Zegaoui, V. Belandria, S. Bonnamy, B. Sarh
Abstract This paper compares and evaluates the physicochemical characterization and thermal analysis of different agricultural lignocellulosic biomasses namely: olive pomace (OP), argan shells (AS), date palm seeds (DS) and hydrochar (HC), obtained from the hydrothermal carbonization (HTC) of OP, in order to identify a good potential fuel for thermochemical conversion systems. Several physicochemical and thermal characterization methods were used. The aforementioned biomasses are mainly composed of cellulose, hemicellulose and lignin as shown by the FTIR and XRD analysis. From energy point of view, the hydrochar (HC) has the highest value of the higher heating value (HHV) (27.86 MJ/kg). These results make (HC) a very good candidate for thermochemical energy conversion technologies. Thereafter, thermal analysis (DSC and TGA) was conducted in an inert atmosphere to analyze the thermal behavior of the samples under well-defined thermal conditions. Right after, two kinetics models were used to estimate pyrolysis kinetic parameters (the activation energy (E) and pre-exponential factor (A)) of the four biomasses. Among those are, for example, olive pomace has (E = 200.104 kJ/mol; A = 7.14E + 21 s−1) and (E = 199.053 kJ/mol; A = 3.58E + 21 s−1) according to KAS and FWO models, respectively. Consequently, pyrolysis of (OP) requires less energy to occur, which promotes its energy performances. GRAPHICAL ABSTRACT
{"title":"Physicochemical characterization, thermal analysis and pyrolysis kinetics of lignocellulosic biomasses","authors":"I. Bakhattar, M. Asbik, A. Koukouch, I. Aadnan, O. Zegaoui, V. Belandria, S. Bonnamy, B. Sarh","doi":"10.1080/17597269.2023.2201732","DOIUrl":"https://doi.org/10.1080/17597269.2023.2201732","url":null,"abstract":"Abstract This paper compares and evaluates the physicochemical characterization and thermal analysis of different agricultural lignocellulosic biomasses namely: olive pomace (OP), argan shells (AS), date palm seeds (DS) and hydrochar (HC), obtained from the hydrothermal carbonization (HTC) of OP, in order to identify a good potential fuel for thermochemical conversion systems. Several physicochemical and thermal characterization methods were used. The aforementioned biomasses are mainly composed of cellulose, hemicellulose and lignin as shown by the FTIR and XRD analysis. From energy point of view, the hydrochar (HC) has the highest value of the higher heating value (HHV) (27.86 MJ/kg). These results make (HC) a very good candidate for thermochemical energy conversion technologies. Thereafter, thermal analysis (DSC and TGA) was conducted in an inert atmosphere to analyze the thermal behavior of the samples under well-defined thermal conditions. Right after, two kinetics models were used to estimate pyrolysis kinetic parameters (the activation energy (E) and pre-exponential factor (A)) of the four biomasses. Among those are, for example, olive pomace has (E = 200.104 kJ/mol; A = 7.14E + 21 s−1) and (E = 199.053 kJ/mol; A = 3.58E + 21 s−1) according to KAS and FWO models, respectively. Consequently, pyrolysis of (OP) requires less energy to occur, which promotes its energy performances. GRAPHICAL ABSTRACT","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44733946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-17DOI: 10.1080/17597269.2023.2201731
Mohammed A. Al-Ahdal, Eihab M. Ali, O. Baothman, Abdulasit I. Al-Sieni, Hasan Al-Talhi
Abstract This study aimed to correlate hydrolytic enzymes with enhanced bioethanol production during the simultaneous process of saccharification and fermentation for different agricultural wastes. This study screened the activities of hydrolytic enzymes to evaluate the simultaneous process and correlated them with bioethanol production. The results of the simultaneous process showed that cantaloupe peels produced the highest amount of reducing sugars and bioethanol. Cellulase showed maximum activity in the first 24 h, indicating that yeast cells favoured glucose over xylose. The results of the simultaneous saccharification and fermentation experiments revealed a 5-fold decrease in cellulase activity after 72 h. Xylanase activity improved from 79.38 to 95.18 U g−1, and bioethanol production was enhanced from 21.42 to 75.66 g L−1, confirming the capability of the simultaneous process to enhance bioethanol production. Although ethanol production was lower than that obtained with xylose cultivation alone, it was higher than that observed with glucose.
{"title":"Xylanase enhanced second-generation bioethanol production through simultaneous saccharification and fermentation","authors":"Mohammed A. Al-Ahdal, Eihab M. Ali, O. Baothman, Abdulasit I. Al-Sieni, Hasan Al-Talhi","doi":"10.1080/17597269.2023.2201731","DOIUrl":"https://doi.org/10.1080/17597269.2023.2201731","url":null,"abstract":"Abstract This study aimed to correlate hydrolytic enzymes with enhanced bioethanol production during the simultaneous process of saccharification and fermentation for different agricultural wastes. This study screened the activities of hydrolytic enzymes to evaluate the simultaneous process and correlated them with bioethanol production. The results of the simultaneous process showed that cantaloupe peels produced the highest amount of reducing sugars and bioethanol. Cellulase showed maximum activity in the first 24 h, indicating that yeast cells favoured glucose over xylose. The results of the simultaneous saccharification and fermentation experiments revealed a 5-fold decrease in cellulase activity after 72 h. Xylanase activity improved from 79.38 to 95.18 U g−1, and bioethanol production was enhanced from 21.42 to 75.66 g L−1, confirming the capability of the simultaneous process to enhance bioethanol production. Although ethanol production was lower than that obtained with xylose cultivation alone, it was higher than that observed with glucose.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43735658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Statistical approach for optimization of levulinic acid production from orange peel as agricultural waste","authors":"Gwi-Taek Jeong","doi":"10.1002/bbb.2498","DOIUrl":"https://doi.org/10.1002/bbb.2498","url":null,"abstract":"","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51295954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：